1. Introduction
Modal yarn is a regenerated cellulose fiber spun from beechwood pulp — semi-synthetic, plant-based, and engineered to outperform standard viscose rayon in every dimension that matters on a production line: wet strength, dimensional stability, and dye consistency. For textile manufacturers and garment factories, modal occupies a strategic middle ground: softer and more absorbent than cotton, stronger and more stable than viscose, and less expensive than lyocell.
At YarnMFG, we produce modal and cotton-modal blended yarns across a range of counts and ratios for applications from underwear and t-shirts to premium knitwear and home textiles. This guide covers what buyers need to know — beyond the consumer-facing talking points — to make informed procurement decisions.
2. How Modal Yarn is Made
Modal begins as beechwood chips, predominantly sourced from sustainably managed European forests. The chips are dissolved into a pulp, then extruded through a spinneret into fibers using a solvent-spinning process. Unlike conventional viscose production, which generates significant carbon disulfide emissions, modal manufacturing uses a closed-loop system that recovers and reuses approximately 95% of the spinning solvent.
The result is a fiber with a smooth surface, circular cross-section, and higher wet tenacity than viscose — because modal undergoes a modified coagulation bath and higher stretching during production, which aligns the cellulose chains more effectively. The dominant global supplier is Lenzing AG (Austria), which markets modal under the TENCEL™ Modal brand. Non-Lenzing modal exists but typically lacks the same quality consistency and certification traceability.
Modal is also available in finer denier variants:
- Standard modal — 1.3–1.7 dtex, used in most apparel yarns
- MicroModal® — 0.9–1.0 dtex, for ultra-lightweight luxury knits and intimate apparel
- MicroModal® Air — below 0.9 dtex, the finest variant for premium next-to-skin garments
3. Modal vs Viscose vs Lyocell: The Key Differences
Modal belongs to the regenerated cellulose family alongside viscose and lyocell. All three start from wood pulp, but their production processes and resulting fiber properties differ substantially — and those differences directly affect spinnability, fabric performance, and price.
Property | Viscose | Modal | Lyocell | Why It Matters |
Dry Tenacity (cN/tex) | 15–25 | 23–30 | 34–40 | Modal offers ~40% higher dry strength than viscose at marginally higher cost |
Wet Tenacity (cN/tex) | 7–12 | 18–25 | 28–34 | Modal’s 2× wet strength over viscose enables machine washing without fiber collapse |
Production | Open process, CS₂ emissions | Closed-loop, ~95% solvent recovery | Closed-loop, >99% solvent recovery | Modal’s environmental profile is significantly cleaner than viscose |
Moisture Regain (%) | 11–13 | 11–13 | 11–13 | All three absorb moisture similarly; modal’s advantage is strength when wet |
Price Tier | $ | $$ | $$$ | Modal sits 20–40% above viscose, 15–25% below lyocell |
Practical takeaway: choose viscose when cost dominates; choose lyocell when maximum wet durability and eco-credentials are non-negotiable; choose modal when softness, strength when wet, and mid-range pricing align with your product positioning.
4. Modal Yarn Properties: The Data Buyers Need
The table below compiles the quantitative properties that matter for yarn procurement — the same metrics you should request on a supplier’s specification sheet before placing a purchase order.
Property | Modal (1.3 dtex) | Manufacturing Relevance |
Dry Tenacity (cN/tex) | 23–30 | Sets upper limit for yarn count and machine tension |
Wet Tenacity (cN/tex) | 18–25 | Determines wash durability; modal retains ~70–80% strength wet vs viscose’s 40–50% |
Elongation at Break (%) | 12–18 | Sufficient elongation for knitting; avoids brittle breaks on high-speed circular machines |
Moisture Regain (%) | 11–13 | ~50% higher than cotton (7–8.5%); supports cooling and comfort in finished garments |
Density (g/cm³) | 1.52 | Slightly lower than cotton (1.54); fabric weight calculations adjust accordingly |
Dimensional Stability | Low shrinkage (<3% at 40°C) | Fewer customer returns due to garment distortion after washing |
Pilling Resistance | Good — better than cotton | Smooth fiber surface plus adequate wet strength reduces surface fuzz generation |
Modal yarn takes reactive dyes well, producing bright colors with good wash fastness. However, because its surface is smoother than cotton’s, dye penetration is slightly different — experienced dyehouses adjust their salt-alkali profile to compensate. Request lab dips from each new lot. Modal’s batch-to-batch color consistency is generally better than viscose but still warrants testing before bulk runs.
5. Blend Engineering: Cotton-Modal Ratios That Work
Pure 100% modal yarn is technically spinnable but relatively uncommon in commercial production. Most modal enters the supply chain as a blend — the question is at what ratio, and for what purpose.
The table below shows the most widely produced modal blend specifications in the market:
Blend | Ratio | Typical Count (Ne) | Primary Application | Sample Available? |
Cotton-Modal | 60/40 | 16s–32s | T-shirts, underwear, loungewear — softness with cotton structure and lower cost | Yes |
Cotton-Modal | 50/50 | 21s–40s | Premium knitwear, polo shirts, lightweight tops — elevated drape and hand feel | Yes |
Cotton-Modal | 70/30 | 16s–32s | Entry-level modal blend — softer than 100% cotton, minimal cost uplift | Yes |
Modal-Rich Blend | 80/20 Modal-Cotton | 30s–60s | Luxury intimate apparel, sleepwear — silk-like hand with cotton dimensional stability | Yes |
Modal-Spandex | 95/5 | 30s–50s | Activewear linings, body-hugging tops — modal softness plus spandex stretch recovery | Yes |
Modal-Wool | 50/50 | 24s–40s | Lightweight sweaters — wool warmth with modal drape and next-to-skin comfort | On request |
Why cotton-modal blends dominate: Cotton provides the structural backbone and keeps the per-kg cost manageable; modal provides the softness, drape, and moisture management that differentiate the finished garment. The 60/40 cotton-modal ratio (YarnMFG’s most popular stock item) hits the sweet spot — a clear sensory upgrade from 100% cotton without doubling the yarn bill.
6. Applications by Yarn Count
Modal’s smooth surface and consistent staple length make it highly spinnable on ring frames from Ne 16s up to Ne 60s. Open-end spinning is possible for coarser counts (Ne 10s–16s) but less common because modal’s value proposition — softness and drape — is best realized in ring-spun quality.
Count Range | Typical Fiber/Blend | Primary Applications | Key Selling Point |
Ne 10s–16s | Modal-cotton blends, modal-rich OE yarns | Towels, bathrobes, home textiles | Higher absorbency than 100% cotton terry |
Ne 16s–24s | 60/40 or 50/50 cotton-modal | T-shirts, tank tops, underwear, casual knitwear | Noticeably softer than 100% cotton; retail price premium justifies the BOM cost |
Ne 24s–32s | 50/50 cotton-modal, 80/20 modal-cotton | Premium polo shirts, dresses, lightweight blouses | Fluid drape, low shrinkage, color brilliance |
Ne 32s–60s | Modal-rich blends, modal-spandex 95/5, MicroModal® | Luxury intimate apparel, sleepwear, premium linings | Silk-like hand at a fraction of silk’s cost; compatible with fine-gauge knitting |
7. Certifications & Procurement Checklist
For modal yarn entering regulated markets, three certifications carry the most weight:
- OEKO-TEX® STANDARD 100
- FSC
- EU Ecolabel
Before issuing a purchase order for modal yarn, run through this five-point checklist:
- Verify fiber origin— is it Lenzing TENCEL™ Modal? Request the certificate.
- Request tenacity and CVm% test reports— target CVm ≤ 13% for counts Ne 24+.
- Confirm count, twist level (TPM), and blend ratio— write these into the PO, not just the email.
- Check certification documentation— scope certificate PDF, not just a certificate number.
- Sample before bulk— modal’s smooth surface can cause minor dye uptake differences between production lots. Run at least two lab-dip confirmations from separate production batches.
8. Modal vs Cotton: Head-to-Head for Apparel Buyers
Modal is frequently positioned as a premium upgrade to cotton in the same product categories. Here is how they compare on the metrics buyers care about:
Criterion | 100% Cotton | Cotton-Modal Blend (60/40) |
Hand Feel | Soft, natural, slightly crisp | Noticeably softer, silk-like |
Moisture Absorption | 7–8.5% regain | ~50% higher absorption |
Dye Brilliance | Good with reactive dyes | Superior color depth and luster |
Shrinkage | 3–5% typical | <3% at 40°C |
Pilling Resistance | Moderate | Better — fewer surface fibers |
Cost per kg | $ (baseline) | 15–30% premium over 100% cotton |
Best For | Mass-market basics, workwear | Mid-to-premium apparel where softness sells |
The takeaway: if your customer is selling a £12 t-shirt, 100% cotton is the right fiber. If they are selling a £25+“supersoft” t-shirt, a 60/40 or 50/50 cotton-modal blend gives them a verifiable material story to justify the price point.
9. Frequently Asked Questions
Q: Is modal yarn eco-friendly?
Modal is more environmentally responsible than conventional viscose because of its closed-loop solvent recovery (~95%) and reliance on beechwood — a fast-growing, low-water-demand tree species typically sourced from FSC-certified European forests. However, the fiber is still chemically processed and not biodegradable in the same way untreated cotton is. For maximum eco-credentials, lyocell (TENCEL™) with >99% solvent recovery is the stronger choice, but modal offers a meaningful environmental improvement over standard viscose at a lower cost than lyocell.
Q: How does modal compare to cotton for t-shirts?
Modal-blend t-shirts feel softer, drape better, and absorb moisture faster than 100% cotton equivalents. They also shrink less and resist pilling longer. The trade-off is a 15–30% higher yarn cost. For brands where “softest t-shirt you’ll ever wear” is a selling point, the cost delta is easily absorbed. For budget basics, cotton remains the standard.
Q: Can modal yarn be used for activewear?
Modal alone lacks the stretch recovery needed for high-performance activewear. However, a 95/5 modal-spandex blend works well for yoga tops, studio wear, and activewear linings where softness and breathability matter more than maximum elasticity. For high-compression sportswear (leggings, sports bras), polyester-spandex or nylon-spandex remains the better choice.
Q: What is the difference between modal and MicroModal?
MicroModal® is a finer-denier variant (0.9–1.0 dtex vs standard modal’s 1.3–1.7 dtex). The finer individual fibers produce an even softer, lighter fabric — typically used in luxury intimate apparel and ultra-lightweight knits at Ne 40s and above. MicroModal® Air (<0.9 dtex) is the finest grade available. Both are Lenzing trademarks and carry the same OEKO-TEX certification compatibility as standard modal.
Q: Does modal yarn shrink?
Modal has better dimensional stability than cotton. Expect <3% shrinkage at a 40°C wash cycle vs cotton’s typical 3–5%. That said, any cellulosic fiber will shrink somewhat on first wash — pre-shrinking the fabric (compacting/mercerizing) before cutting eliminates most of this risk at the garment level.
10. Conclusion
Modal yarn occupies a strategic position in the textile fiber landscape: softer and more stable than cotton, stronger and cleaner than viscose, more affordable than lyocell. For manufacturers producing mid-to-premium knitwear, underwear, loungewear, and home textiles, a cotton-modal blend — particularly 60/40 or 50/50 — delivers a verifiable product upgrade at a manageable cost increment.
YarnMFG produces modal and cotton-modal blended yarns from Ne 10s to Ne 60s, including our most popular stock items: 60/40 combed cotton-modal in Ne 21s and Ne 32s, with OEKO-TEX Standard 100 certification and third-party testing documentation (SGS, ITS, BV) provided with every shipment.
To request specification sheets, lab-dip samples, or certification documentation, contact our yarn specialists or browse our modal and blended yarn product catalog.
Disclaimer: Modal is a registered trademark of Lenzing AG in many jurisdictions. TENCEL™, MicroModal®, and MicroModal® Air are trademarks of Lenzing AG. Fiber property values are typical ranges; actual values vary by supplier, yarn count, and processing conditions. Certifications referenced are current as of July 2026.
